National Physical Laboratory

Calibration of a photodiode array spectrometer against the copper point

Further Information

Published: 24 October 2013

Authors: S.G.R. Salim, E.R. Woolliams, N.P. Fox

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This paper describes a method to calibrate photodiode array spectrometers in spectral radiance mode using a fixed-point blackbody as a reference source.

The potential advantage of the fixed-point traceability chain is that it can be universally reproduced without recourse to any hierarchical calibrations or standards.

The paper presents the calibration system and discusses the limitations of such an approach. The method used obtained an uncertainty of around 1.4 % (k = 2) associated with radiance responsivity.

Last Updated: 24 Oct 2013
Created: 22 Aug 2013